CN101349009A - Fiber pervasion swelling agent and method for dyeing the same - Google Patents

Abstract

The invention discloses a fiber penetrating swelling agent which comprises the compositions in weight portion: 0.00016 to 0.0006 portion of laurocapram, 1 to 5 portions of N-methyl pyrrolidone, 5 to 10 portions of diacetone alcohol, 5 to 15 portions of ethyl salicylate, and 5 to 10 portions of isopropyl salicylate. The invention also discloses a method for dyeing by the fiber penetrating swelling agent, comprising the following steps that: a reducing agent and sodium hydrate are used for reducing the dye by a vatting method; the weight ratio of a reducing solution to the dye is 37.5: 0.8 to 2.0; a leveling agent and the fiber penetrating swelling agent are added to dye or a buffering agent is added to adjust the pH value and is dyed by vat acid, the temperature is reduced and the mixture is washed; the mixture is subjected to oxidizing to develop color, fixing, reducing temperature and washing; the fresh water bath is performed, the fiber penetrating swelling agent is reduced and washed, and the temperature is reduced and the fiber penetrating swelling agent is produced. The fiber penetrating swelling agent ensures that the dye insoluble in water is effectively moistened and penetrated, and the fiber crystallizing area is effectively swelled to receive the dye; the fiber penetrating swelling agent ensures that a suspended solid is dyed evenly, has good homochromatism, improves the degree of dyeing, and solves the 'white core' problem of fiber.

Description

Fiber pervasion swelling agent and with its method that dyes

Technical field

The present invention relates to the fibre treatment technique field, especially the technical field of fortifying fibre infiltration puffing.

Background technology

Reducing dye has COLOR FASTNESS preferably, and especially Exposure to Sunlight, the staining fastness of soaping are good, but remains in problems such as poor permeability, suspended substance dyeing look flower, leuco compound instabilities unresolved with its vat acid, leuco compound dyeing.

The leuco vat dye decoration method is that insoluble reducing dye is become the water-soluble dyestuff of energy by alkali treatment, but the sodium salt of dyeing this moment has not been original color, so be leuco compound, the method that leuco dye is dyeed is called leuco dyeing process.Use the method for oxidation after having dyed again, become original insoluble color status again.Tradition leuco vat dye dyeing because pH is too big to fibre damage about 12.0, and to some fiber and be not suitable for, is unfavorable to polyester, polyurethane, polyamide, wool etc. for example.

The reducing dye cutting that reducing dye suspended substance decoration method is used for dyeing is dispersed into tiny solids (water insoluble) and is suspended in the method that dyeing liquor dyes.The difficulty of suspended substance dyeing is and must disperses the reducing dye cutting very thin, otherwise the meeting dyeing flower.The tradition reducing dye is with the suspended substance decoration method between the pH4.0-5.5, but so far because dye particles is too thick in the suspended substance, the suspension instability, and produce look flower problem and do not break through solving dyeing.Though and the suspended substance between the external existing pH4.0-5.5 dyes, because of the harmful substance that contains not environmental protection also should not be used, the dyestuff grain of suspended substance formation is still thin inadequately in addition, and look flower problem does not have thoroughly solution.

The dyeing quality of reducing dye depends on the stability of reduction leuco compound, vat acid to a great extent.External some relevant patent was done some improvement when addressing the above problem; but all there is certain problem: R.C.SHAH (Textile Chemist and Colorist; VOL4; N011; NOV7; 1972, P59-61) add protecting colloid and can delay the oxidation rate of sodium hydrosulfite, thereby increased the stability of leuco vat dye, vat acid.ELLIS (USP4582510 (1985)) has optimized GUAR guar gum and the XANTHAN xanthans suitable colloid as reduction leuco compound, vat acid in numerous colloids.Yet add the stabilizing agent of xanthans protecting colloid as dye liquor, cause that the viscosity of dyeing liquor significantly rises, leuco dye, vat acid permeability and diffusivity sharply descend, and have increased the weight of " Bai Xin " problem.

The synthetic leather manufacturing that particularly ultra-fine polyester/polyurethane is done substrate is risen just at home.Because the problem that exists in the above-mentioned dyeing, make index such as COLOR FASTNESS not reach requirement, show that the class of product and added value are low, had a strong impact on the quality of product, its price only has 1/10th of external (as Japan) like product.If aspect COLOR FASTNESS, can make a breakthrough, will make the synthetic leather trade out of trade of China increase significantly change.

Before this, the ultra-fine leather of polyester/polyurethane also is main dyeing with the DISPERSE DYES, but in Exposure to Sunlight, soap, aspect such as crock fastness is very poor, do not reach instructions for use, only can be used for cleaning cloth for glasses, decorative wall cloth, bed clothes bunting, toy cloth etc., and can not be used for carplane interior trim cloth, more can not make clothes.

Polyester superfine fibre and polyurethane dye with bathing, Dry Sack rate and form and aspect, and it is also far apart promptly to use sight to measure.Polyester/polyurethane synthetic leather permeability the time shows very poorly in dyeing, shows after dying that " Bai Xin " of " Bai Xin " problem, especially sample is serious, makes sample lose directive significance to full-page proof.The KODAYASHI (TEIJIN) of Japan proposed the dyeing temperature of ultra-fine polyester is brought up to 150 ℃ from 130 ℃ in USP5441543 in nineteen ninety-five, and this makes permeability, dye uptake and the COLOR FASTNESS of dyestuff that very big enhancement all be arranged.Yet increase the weight of because high temperature causes the polyester superfine fibre damage, thereby cause the powerful decline of leather, simultaneously, energy consumption is higher in the production, and this temperature promotes that the means of COLOR FASTNESS have been limited greatly.

Traditional bleeding agent such as Nekal BX, paregal O, bleeding agent OPE phosphate all is hydrophilic, they can not make water-insoluble solid dyestuff grain effective wetting, infiltration, can not make the crystal region of fiber effectively expanded to accept dyestuff again; Make with hydrophilic dispersant and comprise sodium lignin sulfonate, dispersant IW, dispersant N, Dispersant MF, dispersing agent C NF uses with above-mentioned bleeding agent altogether, can not reach both wetting dye suspension grain, again texturized fiber, make the suspended substance even dyeing, and homochromatism is good.

Summary of the invention

Goal of the invention of the present invention makes the crystal region of fiber effectively expanded for providing a kind of, increases permeability, makes dyestuff dye uptake height, is applicable to the fiber pervasion swelling agent of multiple stock-dye.

The technical scheme that realizes the foregoing invention purpose is as follows:

Fiber pervasion swelling agent, by weight, composed as follows:

Compositing range preferable range optimum ratio

Lauryl azone 0.00016-0.0006 0.00018-0.0004 0.00025

N-Methyl pyrrolidone 1-5 2-4 3.5

Diacetone alcohol 5-10 6-8 7.0

Salethyl 5-15 8-12 10.0

Isopropyl salicylate 5-10 8-10 9.0.

Method with above-mentioned fiber pervasion swelling agent dyes comprises the following steps:

A, with following dyestuff complex reducing agent, solid NaOH and water preparation reducing solution, wherein dyestuff composite reduction agent concentration is 27.0g/L, NaOH concentration is 11.5g/L; With reducing solution with the vatting method to reducing dyes, form leuco compound, wherein reducing solution: dyestuff=37.5: 0.80-2.0 (weight ratio), standby;

Concentration range

B, add acid buffer agent and adjust pH value, the leuco compound in the steps A is modulated into vat acid, and/or add levelling agent and add fiber pervasion swelling agent and dye, cooling is washed;

C, carry out oxidative color-developing, fixation, cooling flushing then;

D, renew bright water-bath, reduction cleaning, cooling flushes out machine.

Also have pretreatment stage between steps A and the B in said method, promptly add dispersant and defoamer in dye vat, regulating dye bath pH with NaOH liquid is 11.5, adds to dye base, is warming up to 80 ℃ with 1 ℃/min, handles 30～40 minutes.

By weight, the dyestuff complex reducing agent in the said method is composed as follows:

Sodium hydrosulfite 8～20

Thiourea dioxide 5～40

Sodium sulfite 5～15

Further, by weight, the dyestuff complex reducing agent in the said method is composed as follows:

Sodium hydrosulfite 10

Thiourea dioxide 10

Sodium sulfite 5

1. the dye structure that fiber pervasion swelling agent of the present invention is suitable for

It is the anthraquinone reducing dye of, Er oxazole system, acridone system, sulphur xanthene ketone system, pyrazine system, blue anthrone system that the dye structure that fiber pervasion swelling agent of the present invention is suitable for has acid amides system, imines system, carbazole system, triazine Xi, oxazole system, thiazole system, imidazoles; Benzene embedding anthrone system, anthracene are formed the anthrone reducing dye of anthrone system, pyrene anthrone system, pyrazole anthrone system, pyrimidine anthrone system, pyridine anthrone system, dianthrone ethane system; The dyestuff of perylene system; It is indigoid reducing dye, soluble vat dye and SULPHUR DYES etc. that the indigo of indigo, thioindigo system is arranged.

Suitable kind is pressed Colour index number (world's dye species 2000, Shenyang Chemical Engineering Inst) and is exemplified below:

C.I.VAT. yellow .2#, 3#, 4#, 20#, 29#, 30#.

C.I.VAT. orange .7#, 39#.

C.I.VAT. red .1#, 3#, 10#, 14#, 15#, 23#, 28#, 29#, 31#.

C.I.VAT. blue .4#, 6#, 18#, 20#, 43#, 64#.

C.I.VAT. brown .1#, 5#, 9#, 39#, 45#, 57#, 68#, 72#.

C.I.VAT. purple .1#, 8#, 14#.

C.1.VAT. green .1#, 2#, 3#, 4#, 29#.

C.1.VAT. black .1#, 8#, 16#, 25#.

C.I.PIGMENT. orange .43#.

C.I.PIGMENT. red .179#, 189#, 190#, 194# fly 195#, 224#.

C.I.PIGMENT. purple .31#.

C.I.PIGMENT. brown .26#, 27#.

C.1PIGMENT. black .32#.

C.I.SOLUBILIZED.VAT. yellow .4#.

C.I.SOLUBILIZED.VAT. red .1#, 3#.

C.I.SOLUBILIZED.VAT. purple .8#.

C.I.SOLUBILIZED.VAT. green .2#.

C.I.SOLUBILIZED.VAT. brown .1#, 5#.

C.I.SOLUBILIZED.VAT. black .1#.

C.I.SULPHUR.. black .1#.

2, fiber pervasion swelling agent dyeing useful fiber kind of the present invention

The present invention not only is used for dermatine dyeing, also can be used for the dyeing of artificial fibre and natural fabric simultaneously.Useful fiber kind of the present invention has the fiber of ultra-fine polyester, ultra-fine polyesteramine, polyurethane, wool, silk, cotton, day silk, PBT, PPT, azelon, model, acetate, zein fiber and mutual blending thereof.

Fiber pervasion swelling agent of the present invention proposes with lauryl azone, N-Methyl pyrrolidone, diacetone alcohol, salethyl and isopropyl salicylate composite, pervasion swelling agent as with reducing dye and pigment dyeing the time, make water-insoluble solid dyestuff grain effective wetting, infiltration, make the crystal region of fiber effectively expanded again to accept dyestuff; Comprise sodium lignin sulfonate, dispersant 1W with hydrophilic dispersant, dispersant N, Dispersant MF, dispersing agent C NF uses with above-mentioned pervasion swelling agent altogether, the wetting dye suspension grain of energy, texturized fiber makes the suspended substance even dyeing again, and homochromatism is good.Strengthen dye uptake, solved " Bai Xin " problem that contains polyurethane fiber.

Use dye reducing agent in the method for the present invention, special-purpose reducing agent as reducing dye, SULPHUR DYES, perylene pigment system reduction leuco compound, increase the stability of leuco compound, improve the Dry Sack rate, Color reproduction, COLOR FASTNESS and color uniformity, simultaneously can exempt the harm of formaldehyde to environmental protection and human body, the good of method all dyed than foreign patent (USP6942706) method and tradition in the various aspects of performance aspect.

The invention proposes when dyeing with vat, use the leuco vat dye alkalies, in 80 ℃ in earlier stage of dyeing, pre-treatment in 40 minutes, can promote the absorption of hyperfine polyester fiber, with the further homochromatism of improving two kinds of components in the synthetic leather to reduction leuco compound, vat acid.

The specific embodiment

The invention will be further described below in conjunction with embodiment and Comparative Examples, with the reducing dye is example, dye method and foreign patent (USP6942706) method as a comparison case with the reducing dye tradition, the reducing dye tradition is dyed method, method is drawn from volume such as Zhao Wei rope " reducing dye " the 457th page, 1993.12. chemical engineering industry publishing house, front page, reductant are simple sodium hydrosulfites.Foreign patent (USP6942706) method, reductant be contain formaldehyde, with sodium hydrosulfite: N methylol sulfinic acid=1.0: 1.0 proportionings are mixed and are pieced together.The used reductant of the present invention does not contain formaldehyde, is three reductant sodium hydrosulfites: thiourea dioxide: sodium sulfite=1.0: 1.0: 0.5 proportionings are mixed and are pieced together.Fiber pervasion swelling agent proportioning used among the embodiment is: lauryl azone 0.00025 weight portion, N-Methyl pyrrolidone 3.5 weight portions, diacetone alcohol 7.0 weight portions, salethyl 10.0 weight portions, isopropyl salicylate 9.0 weight portions.

Following table 1 is given an example for the consumption of the present invention and traditional method, foreign patent reductant and alkali preparation reducing solution

Table 1

Embodiment 1: polyester fiber and polyurethane are formed synthetic leather dyeing

Form synthetic leather by 0.02 dawn polyester fiber and polyurethane, substance 700g/M ², C.1.VAT. brown .5# of dyestuff, 6% (2006.11/22) uses leuco vat dye, vat acid dyeing.

(A) press table 1 and make reducing solution of the present invention, be that the Three kinds of hors d'oeuvres complex reducing agent (is sodium hydrosulfite 10.8g/L and sodium sulfite 5.4g/L, common 27g/L), solid NaOH and water preparation reducing solution, wherein Three kinds of hors d'oeuvres composite reduction agent concentration is 27.0g/L, NaOH concentration is 11.5g/L, with the vatting method reducing dyes is modulated leuco compound, reducing solution: dyestuff=37.5: 1 (weight ratio), add hot water (adding) after 8 minutes with 1: 1 amount of reducing dyes procrypsis body fluid, stand-by when making mixing temperature be 50 ℃;

(B) adding dispersant such as lignin sulfonic acid ammonium salt and defoamer (the froth breaking king of the beautiful thunder chemical assistant in Shanghai company) in the dye vat aqueous solution makes the concentration of lignin sulfonic acid ammonium salt in the solution reach 1g/L, the concentration of defoamer reaches 1-2g/L, regulating dye bath PH with NaOH liquid (10% concentration) is about 11.5, add and dye base, rise to 80 ℃ of last stage leathers that dye with 10/min and handled 30-45 minute, this moment, dyestuff was reduction leuco compound state;

(C) be cooled to 40 ℃ indirectly, add by formic acid to dye bath, citric acid, acetic acid, the cushioning liquid that sodium acetate is formed, make the PH of dye bath reduce to PH3.8-3.9 from 11.5, with dyestuff furnishing vat acid, terylene disperse dyeing high temperature levelling agent FZ810 (Shanghai textile auxiliary factory), the concentration of levelling agent reaches 1-2g/L to the solution, add the present invention with permeating, swelling agent makes its concentration in dye bath reach 2g/L, turned round 20 minutes, be warming up to 90 ℃ with 1 ℃/2min then, be warming up to 125 ℃ with 1 ℃/min again, the vat acid dyeing of reducing dye, cooling flushing were carried out in insulation in 40-60 minute;

(D) renew bright water-bath, add the oxidant ammonium persulfate, and make its concentration reach 2.5g/L, PH5.0 is warming up to 70 ℃ with 1 ℃/min, is incubated 20 minutes, carries out oxidative color-developing, fixation, cooling flushing then;

(E) renew bright water-bath, add reductant thiourea dioxide and cleaning agent neopelex, make that the concentration of thiourea dioxide reaches 2.5g/L in the water-bath, the concentration of cleaning agent neopelex reaches 4g/L, in PH6.0, be warming up to 55 ℃ with 1 ℃/min, be incubated 20 minutes reduction cleaning, cooling flushes out machine.

Following table 2 is present embodiment and Comparative Examples coloration result

Table 2

Embodiment 2: ultra-fine polyamide and polyurethane are formed synthetic leather dyeing

To ultra-fine polyamide of 0.02 dawn: polyurethane=the weight ratio blended fiber dyeed in 65%: 35%.

Press table 1 and make reducing solution of the present invention, sodium hydrosulfite wherein: thiourea dioxide: sodium sulfite=1.0: 1.0: 1.0 dyeings are with embodiment 1, just step (B) the dyeing last stage alkali lye in the embodiment 1 is regulated dye bath pH and is handled, directly in the reduction leuco compound, add acidic buffer, with dyestuff furnishing vat acid, add pervasion swelling agent of the present invention: lauryl azone 0.00025 weight portion, N-Methyl pyrrolidone 2.0 weight portions, diacetone alcohol 8.0 weight portions, salethyl 10.0 weight portions, isopropyl salicylate 9.0 weight portions dye with vat acid, 1 ℃/2min is warming up to 105 ℃, is incubated 40 minutes.COLOR FASTNESS is fine.

Following table 3 is present embodiment 2 and Comparative Examples coloration result

Table 3

Ultra-fine as seen from the above table polyamide and Synthetic Leather with the prescription of the invention at the prescription that is better than aspect level-dyeing property, homochromatism and the COLOR FASTNESS with conventional method and foreign patent.

Embodiment 3: polyether polyols with reduced unsaturation is formed synthetic leather dyeing

Polyether polyols with reduced unsaturation dyeing.Press table 1 preparation reducing solution of the present invention, sodium hydrosulfite wherein: thiourea dioxide: sodium sulfite=2: 4: 1, dyeing is with embodiment 1, just step (B) the dyeing last stage in the embodiment 1 is regulated dye bath pH with alkali lye and handles, directly add acid buffer agent in the step in embodiment 1 (A), with dyestuff furnishing vat acid, add pervasion swelling agent of the present invention: lauryl azone 0.0002 weight portion, N-Methyl pyrrolidone 4 weight portions, diacetone alcohol 6.0 weight portions, salethyl 8.0 weight portions, isopropyl salicylate 10.0 weight portions, with the dyeing of reduction vat acid, 1 ℃/2min rises to 85 ℃, in 85 ℃ of insulations dyeing in 45-60 minute, COLOR FASTNESS is fine.

Following table 4 is present embodiment 3 and Comparative Examples coloration result

Table 4

Polyether polyols with reduced unsaturation dyes method and foreign patent prescription with the prescription of the invention being better than tradition aspect COLOR FASTNESS and the level-dyeing property as seen from the above table.

Embodiment 4: day silk regenerated celulose fibre dyeing

Press table 1 and make reducing solution of the present invention, sodium hydrosulfite wherein: thiourea dioxide: sodium sulfite=1: 2: 1, dyeing is with embodiment 1, just directly with the dyeing of step (B) the alkaline reduction leuco compound among the embodiment 1, with 1 ℃/min temperature rise to 105 ℃, be incubated 40 minutes, and the step (C) in embodiment 1 uses the acid buffer agent adjust pH to form the process of vat acid.Dyeing back COLOR FASTNESS is fine.

Following table 5 is present embodiment 4 and Comparative Examples coloration result

Table 5

This shows that day silk is being better than the foreign patent prescription with the prescription of the invention aspect COLOR FASTNESS and the level-dyeing property.

Embodiment 5: woolen dyed

Press table 1 and make reducing solution of the present invention, sodium hydrosulfite wherein: thiourea dioxide: sodium sulfite=2: 1: 1, dyeing is identical with embodiment 1, just step (B) the dyeing last stage in the embodiment 1 is regulated dye bath pH with alkali lye and handles, directly in reducing solution, add acid buffer agent, use the vat acid direct dyeing, COLOR FASTNESS is fine.

Following table 6 is present embodiment and Comparative Examples coloration result

Table 6

Wool is being better than the foreign patent prescription with the prescription of the invention aspect COLOR FASTNESS and the level-dyeing property as seen from the above table.

Embodiment 6: cotton fiber dyeing

Press table 1 and make reducing solution of the present invention, sodium hydrosulfite wherein: thiourea dioxide: sodium sulfite=2: 1: 1, dyeing is identical with embodiment 1, just the step (C) in the embodiment 1, directly dye with the alkaline reduction leuco compound, and without the vat acid process.With 1 ℃/min temperature rise to 100 ℃, be incubated 40 minutes, COLOR FASTNESS is fine.

Following table 7 is present embodiment and Comparative Examples coloration result

Table 7

This shows that cotton fiber is being better than the foreign patent prescription with the prescription of the invention aspect COLOR FASTNESS and the level-dyeing property.

To ultra-fine polyamide of 0.02 dawn: polyurethane=65%: 35% (weight ratio) blended fiber dyes

Embodiment 7: polyester fiber and polyurethane are formed synthetic leather, write out a prescription with the disperse dyeing dyestuff: 3%C.I. disperse brown 19#

1.5%C.I. disperses blue 284#

1.0%C.I. Disperse Red 278 #

(it is lauryl azone 0.0003 that the auxiliary agent weight portion is formed to add dispersant lignin sulfonic acid ammonium salt, terylene dispersion high-temp dyeing levelling agent FZ810 (Shanghai textile auxiliary factory) and fiber pervasion swelling agent in water-bath, N-Methyl pyrrolidone 2, diacetone alcohol 6, salethyl 10, isopropyl salicylate 10), make the concentration of lignin sulfonic acid ammonium salt in water-bath reach 1-2g/L, the concentration of levelling agent in water-bath reaches, 1-2g/L, the concentration of pervasion swelling agent arrives 3-5g/L.Add froth breaking king (the beautiful thunder auxiliary chemicals in Shanghai company) and make its concentration in water-bath reach 1-2g/L.Add in the balneation after the dissolving of weighing dyestuff has disperseed with the brown 19# in the dyestuff prescription, blue 284#, 284#, add polyester synthetic leather fabric then, turned round 20 minutes, intensification rises to 70 ℃ from 30 ℃, 1 ℃/min of speed, be incubated 15 minutes, rise to 125 ℃ of insulations 60 minutes with 1 ℃/min then, lower the temperature, after oxidation and reduction cleaning, dry.

Embodiment 8: hyperfine polyester fiber and polyurethane are formed the use for synthetic leather disperse dyeing, and except not adding the fiber pervasion swelling agent, other process conditions are fully identical with embodiment 7.

Coloration result:

Added the better of fiber pervasion swelling agent than the COLOR FASTNESS of not adding.See the following form 8.

Whether embodiment 7 and embodiment 8 pervasion swelling agents add influences COLOR FASTNESS

Table 8:

Dye uptake is compared, and embodiment 7 is 98%, and embodiment 8 is 68%, added pervasion swelling agent after, dye uptake obviously increases, the remaining rate of pin water obviously descends, and is very favourable to environmental protection.And aspect level-dyeing property and homochromatism, that has added pervasion swelling agent also has improvement greatly.

Claims (8)

1. fiber pervasion swelling agent, by weight, composed as follows:

Lauryl azone 0.00016-0.0006

N-Methyl pyrrolidone 1-5

Diacetone alcohol 5-10

Salethyl 5-15

Isopropyl salicylate 5-10.

2, fiber pervasion swelling agent according to claim 1 is characterized by, and by weight, it is composed as follows:

Lauryl azone 0.00018-0.0004

N-Methyl pyrrolidone 2-4

Diacetone alcohol 6-8

Salethyl 8-12

Isopropyl salicylate 8-10.

3, fiber pervasion swelling agent according to claim 2 is characterized by, and by weight, it is composed as follows:

Lauryl azone 0.00018-0.0004

N-Methyl pyrrolidone 3.5

Diacetone alcohol 7.0

Salethyl 10.0

Isopropyl salicylate 9.0.

4. one kind is adopted the method that each described fiber pervasion swelling agent dyes in the claim 1 to 3, comprises the following steps:

A, usefulness dyestuff complex reducing agent, solid NaOH and water preparation reducing solution, wherein dyestuff composite reduction agent concentration is 27.0g/L, NaOH concentration is 11.5g/L; With reducing solution with the vatting method to reducing dyes, form leuco compound, wherein reducing solution: dyestuff=37.5: 0.80-2.0 (weight ratio), standby;

B, add acid buffer agent and adjust pH value, the leuco compound in the steps A is modulated into vat acid, and/or add levelling agent and add fiber pervasion swelling agent and dye, cooling is washed;

C, carry out oxidative color-developing, fixation, cooling flushing then;

D, renew bright water-bath, reduction cleaning, cooling flushes out machine.

5. colouring method according to claim 4 is characterized by, and also has pretreatment stage between said method steps A and B, add dispersant and defoamer in dye vat, regulating dye bath pH with NaOH liquid is 11.5, adds and dyes base, be warming up to 80 ℃ with 1 ℃/min, handled 30～40 minutes.

6, the method for employing fiber pervasion swelling agent dyeing according to claim 4 is characterized by: the oxidative color-developing among the described step C adopts ammonium persulfate to carry out oxidative color-developing; Reduction cleaning among the described step D adopts thiourea dioxide and neopelex to reduce.

7. the method for employing fiber pervasion swelling agent dyeing according to claim 4 is characterized by, and by weight, described dye reducing agent is composed as follows:

Sodium hydrosulfite 8～20

Thiourea dioxide 5～40

Sodium sulfite 5～15.

8. the method for employing fiber pervasion swelling agent dyeing according to claim 7 is characterized by, and by weight, described dye reducing agent is composed as follows:

Sodium hydrosulfite 10

Thiourea dioxide 10

Sodium sulfite 5.